High-yield synthesis of multi-branched gold nanoparticles and their surface-enhanced Raman scattering properties.
Multi-branched gold nanoparticles were synthesized in high-yield through the reduction of HAuCl(4) by using hydrazine as a reducing agent. Practically 100% of the particles have numerous branches. The high reduction capability of hydrazine is found to be crucial for the formation of these branched gold nanoparticles. Their size can be controlled from 20 to 130 nm by varying the amounts of hydrazine. The prepared nanoparticles exhibit efficient surface-enhanced Raman scattering (SERS) properties and the SERS activity of the particles depends on the aspect ratio of their branches, which are most likely related to a great increase in the localized electromagnetic field enhancement from their unique sharp surface features arising from the branches.
Jeong
Gyoung Hwa
GH
Department of Chemistry, Research Institute of Natural Science and Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
Lee
Young Wook
YW
Kim
Minjung
M
Han
Sang Woo
SW
D002712:Chlorides / Q000138:chemical synthesis*; D006046:Gold / Q000737:chemistry*; D017612:Gold Compounds / Q000138:chemical synthesis*; D006834:Hydrazines / Q000138:chemical synthesis*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D010084:Oxidation-Reduction; D010316:Particle Size; D013059:Spectrum Analysis, Raman; D013499:Surface Properties
D002712:Chlorides; D017612:Gold Compounds; D006834:Hydrazines; C029424:hydrazine; D006046:Gold; C024568:gold tetrachloride, acid